Philip f



(No Model) P. P. KRUG. L-UBRIUATOR.

Patented July 25, 1893.

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UNITED STATES PATENT OFFICE.

PHILIP F. KRUG, OF NEW YORK, N. Y.

LUBRICATOR.

SPECIFICATION forming part of Letters Patent No. 502,100, dated July 25,1893. Application filed July 5, 1892. Serial No. 438,918. (No model.)

T0 on whom it may concern.-

Be it known that I, PHILIP F. KRUG, a citizen of the United States, anda resident of New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Lubricators, ofwhich the following is a specification.

My invention refers to means for lubricating automatically the bearingsurfaces on loose pulleys, wheels, collars and gearing running loose onshafts, shanks, pins, 850., particularly where such lubrication is to beperformed continuously while the appliances to be lubricated are inrotative motion.

The purposes of my invention are to provide simple and effective meansfor utilizing the centrifugal force produced by revolving machinery ingradually and automatically moving and directing lubricating oil towardthe bearing surfaces to be lubricated and to so construct thelubricating appliances as to prevent wasteful escapeof lubricating oilfrom the same, even when very fluid or light oil is employed therein.The means employed by me in accomplishing these and other usefulpurposes are described hereinafter and more fully set forth in theclaims.

In the accompanying drawings forming part of this specification, Figure1 represents a vertical section of a lubricator constructed according tomy invention, while Fig. 2 represents avertical section of a modifiedform and construction of my lubricator.

Corresponding letters in both figures refer to corresponding parts.

In Fig. 1, A and B are shells preferably made of sheet metal, both shownto be arranged and constructed as inverted conical caps, shell A beingmade of greater depth and of greater maximum diameter than shell B, soas to be capable of entirely surrounding said shell B. j

The outer and upper edge of shell A is provided with a flange a of arectangular cross section, and between the two shells stays b, b areprovided to maintain said shells in their proper relative positions.These stays may either be constructed in the form of pins attached toone or both of said shells, or might preferably be formed by leavingprongs or extensions of proper length along the upper edge of shell Bwhen stamping out or spinning'such shell, and afterward bending suchprojections at right angles to the outer surface of such shell. Both ofsaid shells are mounted solidly on a nipple G, so as to leave betweenthem a space 0 extending from the upper part of the outer surface ofsuch nipple laterally and upward. 1

O is a frame, also preferably made of sheet metal and constructed in theform of an inverted funnel with a flange P attached to the mouth of suchfunnel in such form, as to approach and face the inner surfaces offlange a on shell A and to extend from there in an arched form inwardly,so as to closely approach the upper edge of shell B.

S is a flexible, or pliable, diaphragm forming a bag-like receptacle foroil, and made of sheet rubber or any other suitable material. Its rim isinserted between the upper edge of shell B and the horizontal part offlange a on one side and the lower part of flange P on the other side,and it is firmly secured in such position, and tight joints are securedbetween such diaphragm or bag and the upper edge of shell B, thehorizontal part of flange a and the parts of flange P directly adjoiningits arched part, by. means of screw-threads provided between thevertical parts of flanges a and P.

F is a cap detachably connected with the upper part of frame 0 by meansof screwthreads, so as to close the upper opening Q in such frame whilethe lubricator is in operation. When the lubricator is to be chargedwith oil-this is done through opening Q after first removing cap F.

D is a weight placed within the space unjderneath diaphragm or bag S andis attached to such diaphragm by means of a screw d.

Between the arched part of flange P and the outer part of diaphragm S anannular passage X, X. is formed, such passage being interposed betweenthe oil receptacle above diaphragm S and space 0 located between the twoshells A and B. Perforations Z, Z, in the inner part of said archprovide a pas- Q sage for the oil from said receptacle into said annularspace X, X, and perforations Y, Y,

in the part of the diaphragm underneath said arch provide a passage fromspace X, X, into space 0, O.

E is a passage provided for the oil within nipple G and leading fromspace 0 to the surface which is to be lubricated, the screwthread on theouter surface of such nipple being provided to attach it thereby to thehub I of the pulley or other revolving part of machinery whose bearin gsurfaces are to be lubricated.

K is a screw by means of which passage E may be closed wholly or inpart, thus permitting of thereby regulating the quantity of oil which isto be discharged through passage E.

H is an air passage leading to a space underneath bag S.

After the device has been charged with oil and has been attached to hubI with which it is to be made to revolve, such revolving motion willproduce centrifugal force which will move outward weight D and diaphragmor bag S and will thereby force the oil between said diaphragm and frame0 through perforations Z, Z, annular space X, perforations Y, Y, andpassages O and E to the surfaces to be lubricated, air meantime enteringthrough passage I-l into the space between shell B and diaphragm S, theweight D aiding materially in obtaining sufficient centrifugal force tosecure the prompt outward movement of the diaphragm. There the revolvingparts to be lubricated are subject to high rotative speed and wherelight or very liquid oil is employed in the lubricator thus minimizingthe friction between such oil and the passages along which it must flow,and where the diaphragm is properly proportioned, and made of veryflexible yet heavy material, the centrifugal force imparted to thediaphragm and tending to force its central part outward will besufficient to overcome the difference existing between the centrifugalforces of the bodies of oil in the inward passages and in the outwardpassages and will thus secure proper lubrication.

The device shown in Fig. 2 differs from that illustrated in Fig. 1principally only as to details of construction, it being designed with aview of employing cast metal in the place of sheet metal mentionedabove. In said Fig. 2 the flexible diaphragm S is so inserted between anupper frame M and a lower frame N as to fully divide into two parts thespace inclosed between said two frames, oil being introduced throughopening R which is ordinarily closed by a plug T. The weight D is shownto be provided with a guide e sliding in frame N, for the purpose ofcompelling said weight when moving outward under the influence ofcentrifugal force to travel in a radial direction, thus producing onlysymmetrical changes in the form of diaphragm S, against which weight Dis made to rest. The annular groove X,X provided between frames M and Ncommunicates through perforations Z, Z, with the oil receptacle betweendiaphragm S and frame M, and with passage E within frame N.

I prefer the form of my device as illustrated in Fig. 1, because it issimpler and cheaper in construction,because cap B furnishes efficientprotection for diaphragm S and also because it is less liable to becomeclogged up in case of the oil thickening therein, particularly as thepassage G, (which takes the place of the upper part of the passage Eshown in Fig. 2) can be made of ample size. Besides, in case the oilshould become gummy in the apparatus, this can be promptly rectified byheating the lubricator, the heat penetrating readil'y through the sheetmetal employed in its construction.

It is desirable to be able to readily examine that part of the surfaceof theflexible diaphragm which is kept in contact with the oil and toclean it in case oily sediment should have formed a coating thereonimpairing its elasticity, or to substitute a new diaphragm whenrequired. Byclamping the diaphragm between a lower frame or casing, andthe upper or outer casing which latter contains the opening for chargingthe lubricator with oil, and confining such diaphragm in itspos'ition bymeans of screw-thread arrangement, I accomplish these important objects.It will however be seen that the lubricator might be charged with oilafter unscrewing such upper or outer casing and without having to dependfor such purpose upon a special inlet with a cap or plug for closing thesame.

I claim as new and desire to secure by Letters Patent- 1. In acentrifugal lubricator the combination of an oil cup comprising aflexible bottom surmounted by adetachable cap, a frame supporting suchbottom, a passage between the interior of the oil cup and the surfacesto be lubricated, and means for confining the rim of such flexiblebottom between the supporting frame and the cap, substantially as setforth.

2. In a centrifugal lubricator the combination of an oil cup comprisinga flexible bottom surmounted by a cap, an inlet with proper closingdevice for admitting oil to the oil cup, a frame supporting the flexiblebottom, a passage between the interior of the oil cup and the surface tobe lubricated, and means for confining the rim of the flexible bottombetween the supporting frame and the cap, substantially as set forth.

3. In a centrifugal lubricator the combination of an oil cup comprisinga flexible bottom and a casing 0 held in contact therewith, two shellsas A and B attached to nipple Gr containing the oil passage, the spacebetween said shells communicating with the interior of the oil cup andwith such oil passage, and an air passage leading to the under side ofthe flexible bottom, substantially as set forth.

4:- In a centrifugal lubricator, the combination of an oil cup withflexible bottom, a

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i-dished casing, as A, inclosing and protecting York and State of NewYork, this 2d day of said bottom, an oil passage connecting thein- July,A. D. 1892.

terior of the oil cup with the surfaces to be lubricated, and. an airpassage communicat- 5 ing with the under side of the flexible bot-Witnesses:

tom, all substantially as set forth. CHAS. L. HORACK, Signed at NewYork, in the county of New ERNEST UNGER.

PHILIP F. KRUG.

